/*
 * Copyright (c) 2017, cxy7.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.b3log.solo.model.sitemap;

import org.apache.commons.lang3.StringUtils;

/**
 * Sitemap URL.
 *
 * @author <a href="http://cxy7.com">XyCai</a>
 * @version 1.1.0.0, Sep 22, 2011
 * @since 0.3.1
 */
public final class URL {

	/**
	 * Start URL element.
	 */
	private static final String START_URL_ELEMENT = "<url>";

	/**
	 * End URL element.
	 */
	private static final String END_URL_ELEMENT = "</url>";

	/**
	 * Start loc element.
	 */
	private static final String START_LOC_ELEMENT = "<loc>";

	/**
	 * End loc element.
	 */
	private static final String END_LOC_ELEMENT = "</loc>";

	/**
	 * Start last mod element.
	 */
	private static final String START_LAST_MOD_ELEMENT = "<lastmod>";

	/**
	 * End last mod element.
	 */
	private static final String END_LAST_MOD_ELEMENT = "</lastmod>";

	/**
	 * Loc.
	 */
	private String loc;

	/**
	 * Last mod.
	 */
	private String lastMod;

	/**
	 * Gets the last modified.
	 * 
	 * @return last modified
	 */
	public String getLastMod() {
		return lastMod;
	}

	/**
	 * Sets the last modified with the specified last modified.
	 * 
	 * @param lastMod
	 *            the specified modified
	 */
	public void setLastMod(final String lastMod) {
		this.lastMod = lastMod;
	}

	/**
	 * Gets the loc.
	 * 
	 * @return loc
	 */
	public String getLoc() {
		return loc;
	}

	/**
	 * Sets the loc with the specified loc.
	 * 
	 * @param loc
	 *            the specified loc
	 */
	public void setLoc(final String loc) {
		this.loc = loc;
	}

	@Override
	public String toString() {
		final StringBuilder stringBuilder = new StringBuilder();

		stringBuilder.append(START_URL_ELEMENT);

		stringBuilder.append(START_LOC_ELEMENT);
		stringBuilder.append(loc);
		stringBuilder.append(END_LOC_ELEMENT);

		if (!StringUtils.isBlank(lastMod)) {
			stringBuilder.append(START_LAST_MOD_ELEMENT);
			stringBuilder.append(lastMod);
			stringBuilder.append(END_LAST_MOD_ELEMENT);
		}

		stringBuilder.append(END_URL_ELEMENT);

		return stringBuilder.toString();
	}
}
